Use Managed Instance Group instead of manually creating Nodes in GCE

cluster/kube-util.sh

@@ -22,6 +22,11 @@ function detect-master {
 	echo "KUBE_MASTER: $KUBE_MASTER"
 }
 
+# Get minion names if they are not static.
+function detect-minion-names {
+        echo "MINION_NAMES: ${MINION_NAMES[*]}"
+}
+
 # Get minion IP addresses and store in KUBE_MINION_IP_ADDRESSES[]
 function detect-minions {
 	echo "KUBE_MINION_IP_ADDRESSES=[]"